In plants, what is the use of energy to make living material?

The term "assimilation" refers to the process by which plants convert energy, primarily from sunlight through photosynthesis, into living material. This process involves taking in nutrients from the soil and transforming them, along with carbon dioxide and water, into organic compounds that are essential for growth and development. During assimilation, the plant creates its own biomass by synthesizing proteins, carbohydrates, and other essential molecules necessary for its structure and function.

In contrast, "concentration" is not a term typically used to describe biological processes in plants. It generally refers to the relative amount of a substance in a given volume and does not pertain specifically to the creation of living material. "Absorption" involves the uptake of water and nutrients from the soil but does not specifically encompass the conversion of these materials into biomass. Therefore, the only term that describes the use of energy to create living material in plants is assimilation.